Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Em quais plataformas é possível jogar Portal 2?
 ###Tabelas: CREATE TABLE most_wickets (most_wickets_id AUTO_INCREMENT PRIMARY KEY, Player VARCHAR, Team VARCHAR, Matches INT, Overs INT, Wickets INT, Economy Rate INT, Average INT, Strike Rate INT, Best Bowling VARCHAR) CREATE TABLE ign (ign_id AUTO_INCREMENT PRIMARY KEY, Year INT, Game VARCHAR, Genre VARCHAR, Platform(s) VARCHAR, Developer(s) VARCHAR) CREATE TABLE running_timetables (running_timetables_id AUTO_INCREMENT PRIMARY KEY, No. INT, Station Code VARCHAR, Station VARCHAR, Arrival VARCHAR, Departure VARCHAR, Kilometers INT, Day INT) CREATE TABLE ladies_european_tour_career_summary (ladies_european_tour_career_summary_id AUTO_INCREMENT PRIMARY KEY, Year INT, Tournaments played INT, Cuts made INT, Wins INT, 2nd INT, 3rd INT, Top 10s INT, Best finish VARCHAR, Earnings ( € ) VARCHAR, Money list rank VARCHAR, Scoring average VARCHAR, Scoring rank VARCHAR, Rolex ranking INT) CREATE TABLE averages (averages_id AUTO_INCREMENT PRIMARY KEY, Rank by average INT, Place INT, Couple VARCHAR, Total points INT, Number of dances INT, Average VARCHAR)  
SELECT Platform(s) FROM ign WHERE Game = portal 2